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Fig. 8 | BMC Musculoskeletal Disorders

Fig. 8

From: Simulated weightbearing computed tomography for verification of radiographic staging of varus ankle osteoarthritis: a cross-sectional study

Fig. 8

Stage 3a osteoarthritis of the right ankle in a 65-year-old man. a Stage 3a osteoarthritis on weightbearing frontal radiograph. b Posterior subluxation on weightbearing lateral radiograph. c Joint space narrowing on sagittal simulated weightbearing computed tomography (SW-CT). d, e On coronal SW-CT, evidence of joint space obliteration is not widespread at the anterior distal articular surface of the tibia (d), but widespread joint obliteration was evident posteriorly (e). f The entire posterior row was mapped in the distal articular surface of the tibia with a 12-square grid by mapping result of SW-CT as in Fig. 8d, e. g: All anterior, central, and posterior rows were mapped in the articular surface of the medial malleolus with a 6-square grid by mapping result of SW-CT as in Fig. 8d, e

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